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公开(公告)号：US12098684B2
公开(公告)日：2024-09-24
申请号：US18098433
申请日：2023-01-18
Applicant: ROLLS-ROYCE PLC
Inventor： Peter Swann , Christopher P Madden , Craig W Bemment
CPC classification number: F02C9/40 , F02C9/28 , F05D2220/323 , F05D2220/80 , F05D2270/306 , F05D2270/31
Abstract: A aircraft gas turbine engine and operation method, the engine including: a staged combustion system having pilot and main fuel injectors, and operates in a pilot-only range wherein fuel delivers to pilot fuel injectors, and a pilot-and-main operation range wherein fuel is delivered to at least the main fuel injectors. The engine further includes a fuel delivery regulator to pilot and main fuel injectors, which receives fuel from a first and second source containing fuels each with different characteristics. The staged combustion system switches between pilot-only and pilot-and-main range operation when in steady cruise mode, the mode defining a boundary between first and second engine cruise operation range. The fuel delivery regulator delivers fuel to pilot fuel injectors during at least part of the first engine cruise operation with different fuel characteristics from fuel delivered to one or both pilot and main fuel injectors the second engine cruise operation range.
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公开(公告)号：US12085029B2
公开(公告)日：2024-09-10
申请号：US18084083
申请日：2022-12-19
Applicant: ROLLS-ROYCE plc
Inventor： Peter Swann , Craig W Bemment , Alastair G Hobday , Benjamin J Keeler , Christopher P Madden
CPC classification number: F02C9/40 , F01D21/003 , F02C9/28 , F05D2220/323 , F05D2260/83 , F05D2270/07 , F05D2270/71
Abstract: A method of operating an aircraft that includes a propulsion system. The propulsion system includes a gas turbine engine and a fuel tank arranged to provide fuel to the gas turbine engine. The method includes: determining at least one fuel characteristic of the fuel arranged to be provided to the gas turbine engine; and controlling the propulsion system based on the at least one fuel characteristic.
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公开(公告)号：US12060838B2
公开(公告)日：2024-08-13
申请号：US18099490
申请日：2023-01-20
Applicant: ROLLS-ROYCE PLC
Inventor： Peter Swann , David M Beaven , Craig W Bemment , Alastair G Hobday , Benjamin J Keeler , Christopher P Madden , Martin K Yates
IPC: G01N21/33 , B64D27/10 , B64D47/00 , F02C9/00 , G01N21/3577 , G01N21/64 , G01N33/28 , B64D37/00 , G01N21/35
CPC classification number: F02C9/00 , B64D27/10 , B64D47/00 , G01N21/33 , G01N21/3577 , G01N21/64 , G01N33/287 , B64D37/00 , G01N2021/3595
Abstract: A method of generating a maintenance schedule for an aircraft including one or more gas turbine engines powered by an aviation fuel. The method includes: determining one or more fuel characteristics of the fuel; and generating a maintenance schedule according to the one or more fuel characteristics. Also disclosed is a method of maintaining an aircraft, a maintenance schedule generation system and an aircraft.
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公开(公告)号：US12044177B2
公开(公告)日：2024-07-23
申请号：US18337636
申请日：2023-06-20
Applicant: ROLLS-ROYCE plc
Inventor： Craig W Bemment , Alastair G Hobday , Benjamin J Keeler , Christopher P Madden , Andrea Minelli , Andrew T Smith , Peter Swann , Martin K Yates
CPC classification number: F02C7/224 , F02C9/28 , F23R3/28 , F05D2260/221
Abstract: A method of operating a gas turbine engine is disclosed, the gas turbine engine comprising a combustor arranged to combust a fuel; and a fuel management system arranged to provide the fuel to the combustor. The fuel management system comprises two fuel-oil heat exchangers through which oil and the fuel flow, the heat exchangers arranged to transfer heat to the fuel and comprising a primary fuel-oil heat exchanger and a secondary fuel-oil heat exchanger; and a fuel pump arranged to deliver the fuel to the combustor, wherein the fuel pump is located between the two heat exchangers. The method comprises controlling the fuel management system so as to transfer between 200 and 600 kJ/m3 of heat to the fuel from the oil in the primary fuel-oil heat exchanger at cruise conditions.
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公开(公告)号：US12031493B2
公开(公告)日：2024-07-09
申请号：US18162949
申请日：2023-02-01
Applicant: ROLLS-ROYCE plc
Inventor： Peter Swann
CPC classification number: F02C9/40 , F02C7/22 , F05D2220/323 , F05D2270/053 , F05D2270/08 , F05D2270/303
Abstract: A system has first and second fuel stores for first and second fuels, an engine, a fuel distribution system, first and second flow rates of the fuel contributing to a total flow rate of fuel; and a controller for controlling the relative fractions of the total flow rate of fuel to the engine according to the required power output of the engine such that the relative fraction of the total flow rate of fuel to the engine represented by the second flow rate increases with increasing required power output of the engine. The fuels are selected such that using only the second fuel results in a lower engine temperature than using only the first fuel, for the same mechanical power and/or the second fuel has a lower specific energy than the first and/or the second fuel produces more water during combustion than the first fuel per unit of fuel energy.
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Patent Agency Ranking
公开(公告)号：US11821373B2
公开(公告)日：2023-11-21
申请号：US18053124
申请日：2022-11-07
Applicant: ROLLS-ROYCE plc
Inventor： Christopher P. Madden , Peter Swann
CPC classification number: F02C9/28 , F02C3/30 , F23R3/346 , F02C9/263 , F02C9/40 , F05D2270/08 , F05D2270/804
Abstract: A gas turbine engine for an aircraft. The gas turbine comprises a staged combustion system having pilot injectors and main injectors, a fuel metering system configured to control fuel flow to the pilot injectors and the main injectors, and a fuel system controller. The controller is configured to identify an atmospheric condition, determine a ratio of pilot fuel flow rate for the pilot injectors to main fuel flow rate for the main injectors in response to the atmospheric condition, and inject fuel by the pilot injectors and the main injectors in accordance with said ratio to control an index of soot emissions caused by combustion of fuel therein.
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公开(公告)号：US11643978B2
公开(公告)日：2023-05-09
申请号：US17570433
申请日：2022-01-07
Applicant: ROLLS-ROYCE plc
Inventor： Peter Swann , Christopher P Madden
CPC classification number: F02C9/28 , F23R3/343 , F02C7/22 , F05D2220/323 , F05D2270/07 , F05D2270/13 , F05D2270/303 , F05D2270/311 , F05D2270/313 , F05D2270/335
Abstract: An aircraft including lean-burn gas turbine engines operating in pilot-plus-mains mode with a given initial fuel flow W0, a method of controlling the optical depth of contrails produced by a first group of engines includes the steps of (i) reducing fuel flow to each engine in the first group to change the operation of each engine from pilot-plus-mains mode to pilot-only mode, and (ii) adjusting fuel flow to one or more engines in a second group of engines such that the total fuel flow to engines of the second group is increased, all engines of the second group remaining in pilot-plus-mains mode, and wherein the set of lean-burn engines consists of the first and second groups. Depending on atmospheric conditions, the average optical depth of contrails produced by the engines may be enhanced or reduced compared to when all engines operate in pilot-plus-mains mode with a fuel flow W0.
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公开(公告)号：US11585278B1
公开(公告)日：2023-02-21
申请号：US17853144
申请日：2022-06-29
Applicant: ROLLS-ROYCE plc
Inventor： Peter Swann , David M Beaven , Craig W Bemment , Alastair G Hobday , Benjamin J Keeler , Christopher P Madden , Martin K Yates
IPC: G01N21/35 , F02C9/00 , B64D27/10 , B64D47/00 , G01N33/28 , G01N21/64 , G01N21/33 , G01N21/3577 , B64D37/00
Abstract: A method of determining one or more fuel characteristics of an aviation fuel for powering a gas turbine engine of an aircraft includes: measuring one or more trace substance parameters of the fuel, the one or more trace substance parameters each associated with a respective trace substance in the fuel; and determining one or more fuel characteristics of the fuel based on the one or more trace substance parameters. Further, a fuel characteristic determination system, a method of operating an aircraft, and an aircraft.
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公开(公告)号：US11530651B2
公开(公告)日：2022-12-20
申请号：US17189650
申请日：2021-03-02
Applicant: ROLLS-ROYCE plc
Inventor： Christopher P. Madden , Peter Swann
Abstract: A gas turbine engine for an aircraft. The gas turbine comprises a staged combustion system having pilot injectors and main injectors, a fuel metering system configured to control fuel flow to the pilot injectors and the main injectors, and a fuel system controller. The controller is configured to identify an atmospheric condition, determine a ratio of pilot fuel flow rate for the pilot injectors to main fuel flow rate for the main injectors in response to the atmospheric condition, and inject fuel by the pilot injectors and the main injectors in accordance with said ratio to control an index of soot emissions caused by combustion of fuel therein.
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公开(公告)号：US08849541B2
公开(公告)日：2014-09-30
申请号：US13896793
申请日：2013-05-17
Applicant: Rolls-Royce PLC
Inventor： Peter Swann
CPC classification number: G05D7/0617 , F02C3/30 , F02C9/40 , F05D2270/08 , F05D2270/081 , F05D2270/0831 , F05D2270/804 , Y02T50/671 , Y02T50/677 , Y02T50/678 , Y10T137/0324
Abstract: A method includes i) identifying a period of operation corresponding to a fuel supply requirement; ii) determining at least one ambient air condition in which the machine will operate during the period; iii) determining a duration of time in which, whilst in the ambient air condition, it is required to achieve a predetermined vapor trail characteristic; iv) determining a resultant fuel composition for use by the machine in the ambient air condition to achieve the characteristic, where the resultant fuel composition includes at least one of the first and second fuel compositions; v) determining the ratio of at least the first and second fuel compositions required for sufficient resultant fuel composition for the duration of time determined in step iii); and vi) producing a first signal indicative of the ratio of at least the first and second fuel compositions required for the duration of time determined in step iii).
Abstract translation: 一种方法包括：i）识别对应于燃料供应要求的操作周期; ii）确定在该期间机器将运行的至少一个环境空气状况; iii）确定持续时间，其中在环境空气条件下，需要实现预定的蒸气踪迹特征; iv）确定所述机器在环境空气条件下使用的所得燃料组合物以达到所述特性，其中所得燃料组合物包括所述第一和第二燃料组合物中的至少一种; v）确定在步骤iii）中确定的持续时间内足够的所得燃料组合物所需的至少第一和第二燃料组合物的比例; 和vi）产生指示在步骤iii）中确定的持续时间所需的至少第一和第二燃料组合物的比率的第一信号。
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